Reciprocating -sawmill



(No Model.)

G. W. GARLAND.

REGIPROGATING SAW MILL.

No. 541,160. Patented June 18, 1895.

F L ,LJ

UNITED STATES PATENT, OFFICE.

CHARLES IV. GARLAND, OF DOTSON, W'EST VIRGINIA.

RECIPROCATI NG -SAWMILL.

SEECIFICATION forming part of Letters Patent No. 541,160, dated .T une18, 1895.

Application tiled March 25, 1895.

To all whom it may concern:

Be it known that I, CHARLES W. GARLAND, a citizen of the United States,residing at Dotson, in the county of McDowell and State of WestVirginia, have invented certain new and useful Improvements inReciprocating Sawmills; and I do declare' the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the accompanyin g drawing, and to theletters of reference marked thereon, which forms a part of thisspecification.

This invention relates to certain new and useful improvements inreciprocating sawniills and the vobject of the invention is to produce asaw of this class in which the oscillating arms carrying the saw areoperated by direct connection with a piston rod which is secured to apiston working in a steam cylinder, the said piston having two pistonrods, one passing through the upper end of the cylinder, the otherthrough the opposite end of said cylinder, each pivoted to areciprocating arm to the ends of which the saw is attached.

A further object of the invention resides in the provision of anadditional cylinder for the reception of steam which gives a steampressure strain to the saw, so as to provide against any possibledisaster in case the saw should break.

To these ends and to such others as the invention may pertain, the sameconsists further in the novel construction, combination and adaptationof the parts as will be hereinatter more fully described and thenspecifically detned in the appended claims.

I clearly illustrate my invention in the ac companying drawing, whichwith the letters of reference marked thereon forms a part of thisspecification, and in which drawing similar letters of referenceindicate like parts, in which the figure is a central vertical sectionof the invention, the supporting-frame being shown in dotted lines.

Reference now being had to the details of the drawing by letter, Adesignates the standard which carries the mechanism of the saw, andsecurely fastened to the upright portion of the said standard, is thecylinder B in which the piston C works. The said cylinder has con-Serial No. 543,146. (No model.)

nection with the steam chest D and is provided with the cut oft slidevalve d.

E is a piston rod secured at one end to the under side 0f the saidpiston, its other end pivoted to the oscillating arm F at f, the saidarm being pivoted to an axis G, and its free end carrying one end of thesaw H.

VJ is a pitman secured to the said piston rod E, by means of a wrist pinj, its other end journaled to the crank arm I, on the shaft K. On thesaid shaft K is keyed the eccentric wheel la on which the eccentric rodL works which has connection with and reciprocatesV steam cylinder isthe piston M which has con` nection with an expansion head O in cylinderN, which has open heads. The end of the said piston M has an integral.T-shaped end which engages with the extensions o of the upper expansionhead O, thus locking the said head O to the piston M, and allowing for aslight expansion of the said heads when steam is introduced into thecylinder between the heads through the pipe P, for the purpose ofmaintaining a strain on the saw which has its other end connected to theend of the oscillating arm Q, pivoted to the axis R, and which hasconnection with the expansion head O through the medium of the rod Swhich has its upper end pivoted to the arm Q at s. A stift' spring T,holds the upper arm Q from dropping by itsV own weight, and buckling orbending the saw, when the steam is shut ott'.

Having thus described my invention,what I claim to be new, and desire tosecure by Letters Patent, is-

1. In a reciprocating sawmill, the combination of the oscillating armshaving pivotal connection, one with a piston rod connected to a pistonof a steam cylinder, the other by means of a rod connected to anexpansion head having connection with a piston which is connected to theupper side of the said piston of the steam cylinder, as and for thepurpose set forth.

2. In a reciprocating sawmill, the combination of the steam cylinder,having a piston to the upper and lower ends ot' which are secured pistonrods, the lower piston rod connected to an oscillating sawcarrying arm,the upper piston rod carrying near its free end an expansion head Withina headless cylinintegral projections of the head O, which is` connectedto the upper sawcarrying arm Q, by means ofthe rod S, and the spring T,and connecting pipe P connected to a steam chest at one end its otherend communicating with zo the cylinder between the expansion heads M andO, all 'combined substantially as shown and for the purpose specified.

In testimony whereof I ax my'signature in presence of two Witnesses.

CHARLES WV. GARLAND.

Witnesses:

G. PETTREY, S. L. WALDRON.

